Electrical connector

ABSTRACT

An electrical connector is provided for both power and data transmission. The electrical connector comprises an electrical plug (100) having a plurality of pins (131˜138) and an electrical socket (200) having a plurality of passageways (220) which are arranged corresponding to the plurality of pins (131˜138). The pins (131˜138) of the plug comprise at least one signal pin (131, 136), two or more positive power pins (133, 134) and two or more negative power pins (132, 135). The pins (131˜138) of the plug can be disposed such that the positive power pins (133, 134) and the at least one signal pin (131, 136) are positioned on opposite sides of the negative power pins (132, 135).

BACKGROUND

An electrical connector is an electro-mechanical device for joiningelectrical circuits as an interface using a mechanical assembly. Aconnector can comprise a plug and a socket which are assembled together.A plug can be referred to as a male connector, and a socket can bereferred to as a female connector.

In an electrical system such as a vehicle, various connectors areemployed to transmit electrical power and data communication. Forexample, power connectors are employed to interconnect power lines toelectrical circuits and power consuming components of the system, andsignal connectors are employed transmit signal within the electricalsystem and with external devices.

SUMMARY

An electrical connector is provided for both power and datatransmission. The electrical connector comprises an electrical plughaving a plurality of pins and an electrical socket having a pluralityof passageways which are arranged corresponding to the plurality ofpins. In some embodiments, the pins of the plug comprise at least onesignal pin, two or more positive power pins and two or more negativepower pins. The electrical current is distributed over two or more powerpins, such that a reliability of power transmission and an efficiency ofheat dissipation can be improved.

The pins of the electrical plug can be disposed such that the positivepower pins and the at least one signal pin are positioned on oppositesides of the negative power pins. The negative power pins can beprovided longer than the positive power pins and the at least one signalpin, such that the negative power pins are grounded before the positivepower pins are connected to the socket. The configuration of the plugpins can prevent a sparking when connecting the plug to the socket. Insome embodiments, the plurality of power pins and the at least onesignal pin can comprise a first set of pins and a second set of pinswhich are disposed symmetrically opposite to each other, such that theplug can be connected to the corresponding socket in both a forwarddirection and a reverse direction.

In some embodiments, each of the passageways of the socket has anentrance extending on more than one side of a socket housing, forexample, on two adjacent sides of the socket housing, such that the pinsof the plug can be inserted into the passageways of the socket in morethan one direction. A positioning boss can be provided with the socketand assembled with a positioning groove of the plug, so as to ensure anaccurate mating of the plug and the socket.

An aspect of the disclosure provides an electrical plug for power andsignal transmission, comprising: at least one signal pin configured tocommunicate signal; a plurality of power pins configured to transmitelectrical power, wherein the plurality of power pins comprise at leastone power pin having a first polarity and at least one power pin havinga second polarity opposite to the first polarity; and a plug substrateconfigured to support the at least one signal pin and the plurality ofpower pins.

Aspects of the disclosure also provides a method of manufacturing anelectrical plug, the method comprising: providing a plug substrate; anddisposing a plurality of power pins configured to transmit electricalpower and at least one signal pin configured to communicate signal onthe plug substrate, wherein the plurality of power pins comprise atleast one power pin having a first polarity and at least one power pinhaving a second polarity opposite to the first polarity.

Aspects of the disclosure also provides a method of manufacturing anelectrical plug, the method comprising: disposing a plurality of powerpins configured to transmit electrical power and at least one signal pinconfigured to communicate signal in a mold, wherein the plurality ofpower pins comprise at least one power pin having a first polarity andat least one power pin having a second polarity opposite to the firstpolarity; and molding the plurality of power pins and at least onesignal pin with a plug substrate.

Aspects of the disclosure also provides a movable object, comprising: abody; one or more propulsion units carried by the body and configured toeffect movement of the movable object; and an electrical plug electricalplug for power and signal transmission, comprising: at least one signalpin configured to communicate signal; a plurality of power pinsconfigured to transmit electrical power, wherein the plurality of powerpins comprise at least one power pin having a first polarity and atleast one power pin having a second polarity opposite to the firstpolarity; and a plug substrate configured to support the at least onesignal pin and the plurality of power pins, wherein the one or morepropulsion units are provided with electrical energy via the electricalplug.

Aspects of the disclosure also provides a battery management device formanaging a battery assembly, the battery management device comprising: abattery management circuit electrically connected to the batteryassembly and being configured to manage the battery assembly; and anelectrical plug electrical plug for power and signal transmission,comprising: at least one signal pin configured to communicate signal; aplurality of power pins configured to transmit electrical power, whereinthe plurality of power pins comprise at least one power pin having afirst polarity and at least one power pin having a second polarityopposite to the first polarity; and a plug substrate configured tosupport the at least one signal pin and the plurality of power pins,wherein the electrical plug is provided with the battery managementcircuit and is configured to connect to the battery assembly.

Aspects of the disclosure also provides an electrical socket for powerand signal transmission, the electrical socket comprising: a sockethousing having a plurality of passageways, each of the plurality ofpassageways receiving therein a contact configured to electricallycontact a corresponding plug pin of a mating plug, the contacts of theplurality of passageways comprising at least one signal contactconfigured to communicate signal and a plurality of power contactsconfigured to transmit electrical power, wherein the plurality of powercontacts comprise at least one power contact having a first polarity andat least one power contact having a second polarity opposite to thefirst polarity; and the plurality of passageways each extending from afirst side to a second side of the socket housing.

Aspects of the disclosure also provides a method of manufacturing anelectrical plug, the method comprising: providing a socket housinghaving a plurality of passageways, wherein each of the plurality ofpassageways extends from a first side to a second side of the sockethousing; and disposing a plurality of contacts in the passageways, eachof the plurality of contacts being configured to electrically contact acorresponding plug pin of a mating electrical plug, wherein the contactscomprise at least one signal contact configured to communicate signaland a plurality of power contacts configured to transmit electricalpower, wherein the plurality of power contacts comprise at least onepower contact having a first polarity and at least one power contacthaving a second polarity opposite to the first polarity.

Aspects of the disclosure also provides a method of manufacturing anelectrical plug, the method comprising: disposing a plurality ofcontacts in a mold, each of the plurality of contacts being configuredto electrically contact a corresponding plug pin of a mating electricalplug, wherein the contacts comprise at least one signal contactconfigured to communicate signal and a plurality of power contactsconfigured to transmit electrical power, and wherein the plurality ofpower contacts comprise at least one power contact having a firstpolarity and at least one power contact having a second polarityopposite to the first polarity; and molding the plurality of contactswith a socket housing and forming a plurality of passageways in thesocket housing, wherein each of the plurality of passageways extendsfrom a first side to a second side of the socket housing and receivestherein at least one contact of the plurality of contacts.

Aspects of the disclosure also provides a battery assembly, comprising:at least one battery; and an electrical socket for power and signaltransmission, the electrical socket comprising: a socket housing havinga plurality of passageways, each of the plurality of passagewaysreceiving therein a contact configured to electrically contact acorresponding plug pin of a mating plug, the contacts of the pluralityof passageways comprising at least one signal contact configured tocommunicate signal and a plurality of power contacts configured totransmit electrical power, wherein the plurality of power contactscomprise at least one power contact having a first polarity and at leastone power contact having a second polarity opposite to the firstpolarity; and the plurality of passageways each extending from a firstside to a second side of the socket housing, wherein the electricalsocket is connected to the battery assembly.

Aspects of the disclosure also provides an electrical connector forpower and signal transmission, the electrical connector comprising: anelectrical plug and an electrical socket, the electrical plugcomprising: at least one signal pin configured to communicate signal; aplurality of power pins configured to transmit electrical power, whereinthe plurality of power pins comprise at least one power pin having afirst polarity and at least one power pin having a second polarityopposite to the first polarity; and a plug substrate configured tosupport the at least one signal pin and the plurality of power pins; theelectrical socket comprising: a socket housing having a plurality ofpassageways, wherein the plurality of passageways are arrangedcorresponding to an arrangement of the at least one signal pin and theplurality of power pins of the electrical plug; and the plurality ofpassageways each extending from a first end to a second end of thesocket housing, each of the plurality of passageways receiving therein acontact configured to electrically contact a corresponding signal pinand power pins of the electrical plug, the contacts of the plurality ofpassageways comprising at least one signal contact configured tocommunicate signal and a plurality of power contacts configured totransmit electrical power, wherein the plurality of power contactscomprise at least one power contact having a first polarity and at leastone power contact having a second polarity opposite to the firstpolarity.

In some embodiments, a movable object may comprises: a body; one or morepropulsion units carried by the body and configured to effect a movingof the movable object; a battery assembly; and an electrical connectoras previously described, wherein the battery assembly is adapted toprovide power to said one or more propulsion units via the electricalconnector. In some embodiments, a power system may comprises: a batteryassembly; a battery management device configured to managing a batteryassembly; and an electrical connector as previously described, whereinthe battery management device is adapted to electrically connect withthe battery assembly via the electrical connector.

It shall be understood that different aspects of the invention can beappreciated individually, collectively, or in combination with eachother. Various aspects of the invention described herein may be appliedto any of the particular applications set forth below or for any othertypes of stationary or movable objects. Any description herein of aerialvehicles, such as unmanned aerial vehicles, may apply to and be used forany movable object, such as any vehicle. Additionally, the systems,devices, and methods disclosed herein in the context of aerial motion(e.g., flight) may also be applied in the context of other types ofmotion, such as movement on the ground or on water, underwater motion,or motion in space.

Other objects and features of the present invention will become apparentby a review of the specification, claims, and appended figures.

INCORPORATION BY REFERENCE

All publications, patents, and patent applications mentioned in thisspecification are herein incorporated by reference to the same extent asif each individual publication, patent, or patent application wasspecifically and individually indicated to be incorporated by reference.

BRIEF DESCRIPTION OF THE DRAWINGS

The novel features of the invention are set forth with particularity inthe appended claims. A better understanding of the features andadvantages of the present invention will be obtained by reference to thefollowing detailed description that sets forth illustrative embodiments,in which the principles of the invention are utilized, and theaccompanying drawings of which:

FIG. 1 is a perspective view showing a first side of an electrical plugin accordance with an embodiment of the invention.

FIG. 2 is a perspective view showing a second side of an electrical plugin accordance with an embodiment of the invention.

FIG. 3 is a side view of an electrical plug along a first direction inaccordance with an embodiment of the invention.

FIG. 4 is a top view of an electrical plug in accordance with anembodiment of the invention.

FIG. 5 is a bottom view of an electrical plug in accordance with anembodiment of the invention.

FIG. 6 is a side view of an electrical plug along a second direction inaccordance with an embodiment of the invention.

FIG. 7 is a perspective view showing a first side of an electricalsocket in accordance with an embodiment of the invention.

FIG. 8 is a perspective view of a second side of an electrical socket inaccordance with an embodiment of the invention.

FIG. 9 is a side view of an electrical socket along a first direction inaccordance with an embodiment of the invention.

FIG. 10 is a top view of an electrical socket in accordance with anembodiment of the invention.

FIG. 11 is a bottom view of an electrical socket in accordance with anembodiment of the invention.

FIG. 12 is a side view of an electrical socket along a second directionin accordance with an embodiment of the invention.

FIG. 13 is a perspective view showing a first side of an electricalconnector in accordance with an embodiment of the invention.

FIG. 14 is a perspective view of a second side of an electricalconnector in accordance with an embodiment of the invention.

FIG. 15 is a side view of an electrical connector along a firstdirection in accordance with an embodiment of the invention.

FIG. 16 is a top view of an electrical connector in accordance with anembodiment of the invention.

FIG. 17 is a bottom view of an electrical connector in accordance withan embodiment of the invention.

FIG. 18 is a side view of an electrical connector along a seconddirection in accordance with an embodiment of the invention.

FIG. 19 is a perspective view showing a first side of an electrical plugin accordance with another embodiment of the invention.

FIG. 20 is a perspective view of a second side of an electrical plug inaccordance with another embodiment of the invention.

FIG. 21 is a side view of an electrical plug along a first direction inaccordance with another embodiment of the invention.

FIG. 22 is a top view of an electrical plug in accordance with anotherembodiment of the invention.

FIG. 23 is a bottom view of an electrical plug in accordance withanother embodiment of the invention.

FIG. 24 is a side view of an electrical plug along a second direction inaccordance with another embodiment of the invention.

FIG. 25 is a perspective view showing a first side of an electricalsocket in accordance with another embodiment of the invention.

FIG. 26 is a perspective view of a second side of an electrical socketin accordance with another embodiment of the invention.

FIG. 27 is a side view of an electrical socket along a first directionin accordance with another embodiment of the invention.

FIG. 28 is a top view of an electrical socket in accordance with anotherembodiment of the invention.

FIG. 29 is a bottom view of an electrical socket in accordance withanother embodiment of the invention.

FIG. 30 is a side view of an electrical socket along a second directionin accordance with another embodiment of the invention.

FIG. 31 is a perspective view showing a first side of an electricalconnector in accordance with another embodiment of the invention.

FIG. 32 is a perspective view of a second side of an electricalconnector in accordance with another embodiment of the invention.

FIG. 33 is a side view of an electrical connector along a firstdirection in accordance with another embodiment of the invention.

FIG. 34 is a top view of an electrical connector in accordance withanother embodiment of the invention.

FIG. 35 is a bottom view of an electrical connector in accordance withanother embodiment of the invention.

FIG. 36 is a side view of an electrical connector along a seconddirection in accordance with another embodiment of the invention.

FIG. 37 is a side view of an electrical socket and an electrical plugalong a first direction in accordance with another embodiment of theinvention.

FIG. 38 is a flow chart illustrating a method of manufacturing anelectrical plug, in accordance with an embodiment of the invention.

FIG. 39 is a flow chart illustrating a method of manufacturing anelectrical plug, in accordance with another embodiment of the invention.

FIG. 40 is a flow chart illustrating a method of manufacturing anelectrical socket, in accordance with an embodiment of the invention.

FIG. 41 is a flow chart illustrating a method of manufacturing anelectrical socket, in accordance with another embodiment of theinvention.

FIG. 42 is a view showing pin arrangement of an electrical plug inaccordance with an embodiment of the invention.

DETAILED DESCRIPTION

In an electrical system such as an unmanned aerial vehicle (UAV),electrical connectors can be employed for both power transmission andsignal communication. For example, a battery assembly may be connectedto the UAV body through an electrical connector in order to transmitboth electrical power and battery control signals. The electricalconnector can comprise an electrical plug having a plurality of pins andan electrical socket having a plurality of passageways which arearranged corresponding to the plurality of plug pins. In someembodiments, the pins of the plug comprise at least one signal pin, twoor more positive power pins and two or more negative power pins. Theplug pin configuration allows electrical current to be distributed overtwo or more power pins, such that a reliability of power transmissionand an efficiency of heat dissipation are improved.

In some embodiments, the pins of the electrical plug can be disposedsuch that the positive power pins and the at least one signal pin arepositioned on opposite sides of the negative power pins. In someinstances, the negative power pins can be provided longer than thepositive power pins and the at least one signal pin, such that thenegative power pins are grounded before the positive power pins areconnected to the socket. The plug pin configuration can prevent asparking when connecting the plug to the socket. In some embodiments,the plurality of power pins and the at least one signal pin can comprisea first set of pins and a second set of pins which are disposedsymmetrically opposite to each other, such that the plug can beconnected to the corresponding socket in both a forward direction and areverse direction.

In some embodiments, each of the passageways of the socket has anentrance extending on more than one side of a socket housing, forexample, on two adjacent sides of the socket housing, such that the pinsof the plug can be inserted into the passageways of the socket in morethan one direction. In some instances, a positioning boss can beprovided with the socket and assembled with a positioning groove of theplug, so as to ensure an accurate mating of the plug and the socketduring assembling.

FIG. 1 is a perspective view showing a first side of an electrical plug100 in accordance with an embodiment of the invention. The first sidecan be a top side of the plug which is to be electrically coupled to amating electrical socket. The electrical plug can comprise a pluralityof pins 130. In some embodiments, the plurality of pins comprise atleast one signal pin 131 configured to transmit signal and a pluralityof power pins 132 and 133 configured to transmit electrical power.

In some embodiments, the plurality of power pins can comprise at leastone power pin having a first polarity and at least one power pin havinga second polarity which is opposite to the first polarity. The firstpolarity can be a positive polarity, and the second polarity can be anegative polarity. In some instances, the at least one power pin havinga positive polarity may carry thereon a positive voltage, and the atleast one power pin having a negative polarity may be connected toground. In some embodiments, the plurality of power pins comprise two ormore pins having a positive polarity (e.g., “positive power pins”) andtwo or more pins having a negative polarity (e.g., “negative powerpins”). In some instances, the number of the positive power pins can besame with the number of the negative power pins. Alternatively, thenumber of the positive power pins can be different from the number ofthe negative power pins.

In an electrical plug having two or more positive power pins and two ormore negative power pins, the electrical current can be distributed overthe plurality of power pins, such that a reliability of powertransmission and an efficiency of heat dissipation can be improved ascompared to a configuration in which one positive pin and one negativepin are provided. The electrical current can be evenly distributed overthe plurality of power pins. For instance, in an electrical plug havingtwo positive power pins, a 16 A electrical current can be evenlydistributed over the two positive power pins, such that each positivepower pin transmits an 8 An electrical current. In an electrical plughaving two or more positive power pins and two or more negative powerpins, if one or more positive power pins or one or more negative powerpins fails, the electrical current can be evenly distributed over theremaining power pins.

The plurality of power pins can comprise a power pin 137 which isconfigured to output a constant voltage. For instance, the constantvoltage can be used to power a particular electrical component. In someinstances, the constant voltage is 18V.

In some embodiments, the at least one signal pin of the electrical plugcan be two or more signal pins. The voltage carried on the signal pincan be a positive voltage. For instance, the at least one signal pincomprises at least one signal pin for transmitting signal and at leastone signal pin for receiving signal. Alternatively, the signal may betransmitted and received by one single signal pin. In some instances,the signal is a digital signal. Alternatively, the signal is an analogsignal.

In some embodiments, the at least one signal pin of the electrical plugcan comprise a signal pin 138 which is configured to detect a connectingstatus of the electrical plug to another component. For instance, the atleast one signal pin of the electrical plug can comprise a signal pinwhich is configured to detect if the electrical plug is electricalconnected to a mating electrical socket which is coupled to a battery.The electrical plug can comprise a switch which is configured to controlan electrical conductivity of the electrical plug. For instance, if theswitch is turned off, electrical power and signal are not transmittedthrough the electrical plug.

The electrical plug can be employed to transmit both electrical powerand data communication. For example, the electrical plug can be providedon a UAV body to provide an electrical connection to a power source suchas a battery assembly. Electrical power can be transmitted from thebattery assembly to electrical components, which are carried onboard theUAV, through the electrical plug. The electrical components onboard theUAV can include propulsion means such as electrical motors, payloadssuch as a gimbal, and various sensors such as a camera, an inertialsensor and an ultrasonic sensor. Meanwhile, signals can be communicatedbetween the battery assembly and the electrical components onboard theUAV through the electrical plug. The signals transmitted from thebattery assembly to the electrical components onboard the UAV can besignals indicative of a voltage, a current, a life time, a cycle number,a rate of voltage drop and a temperature of the battery assembly. Thesignals transmitted from the electrical components onboard the UAV tothe battery assembly can be an instruction signal to shut down a batterycell, a polling signal to check a status of battery assembly and adischarging signal to maintain a battery cell.

For another example, the electrical plug can be provided on a batterymanagement device for managing a battery assembly. The batterymanagement device can comprise a battery management circuit which is tobe electrically connected to the battery assembly and can be configuredto manage the battery assembly. For instance, the battery managementcircuit can be configured to charge and/or discharge the batteryassembly, and/or to detect a status of the battery assembly. Theelectrical plug can be provided with the battery management circuit andcan be configured to electrically couple to a corresponding socket ofthe battery assembly.

The plurality of power pins can have a substantially rectangular shape.The plurality of power pins can be identical in dimension and/or shape.For instance, each of the power pins can have a length ranging from 5 mmto 10 mm. The plurality of power pins can be made from a metal materialincluding a copper, an iron, or an alloy thereof. In some embodiments,the power pins are made from copper and coated with gold layer. Themaximum current carrying capacity of each of the power pins can rangefrom 5 A to 20 A. In some embodiments, the maximum current carryingcapacity of each of the power pins is 15 A.

The signal pins can be identical in dimension and/or shape if more thantwo signal pins are provided on the plug. In some instances, the atleast one signal pin can have a length ranging from 5 mm to 10 mm. Insome embodiments, the at least one signal pin has the same dimensionand/or shape with the plurality of power pins.

The at least one signal pin can be made from a metal material includinga copper and an iron. The at least one signal pin may be coated with acoating layer. The coating layer can be made from gold, silver, or analloy thereof. The at least one signal pin can be made from the samemetal material with the power pins. In some embodiments, the at leastone signal pin is made from copper and coated with gold layer.

The plurality of power pins can be aligned in a same row. Alternatively,the plurality of power pins can be staggered. For instance, the two ormore positive power pins can be aligned in a row which is different froma row in which the negative power pins are aligned. The at least onesignal pin and the plurality of power pins can be aligned in a same row.Alternatively, the at least one signal pin and the plurality of powerpins can be staggered. For instance, the two or more signal pins can bealigned in a row which is different from a row in which the plurality ofpower pins are aligned.

A spacing between the positive power pins can range from 1 mm to 3 mm. Aspacing between the negative power pins can range from 1 mm to 3 mm. Aspacing between the signal pins can range from 1 mm to 3 mm if more thantwo signal pins are provided. A spacing between the positive power pinscan be identical to a spacing between the negative power pins. A spacingbetween the power pins can be identical to a spacing between the signalpins. In some embodiments, a spacing between the pins is 2.5 mm.

The electrical plug can be provided with various shapes and dimensionsin accordance with applications thereof. The plug can be provided within a substantially rectangular shape having a length ranging from 10 mmto 60 mm, a width ranging from 3 mm to 20 mm and a height ranging from 5mm to 20 mm. In an embodiment, the plug is provided with in asubstantially cubic shape having a length of 33 mm, a width of 5.8 mmand a height of 6.45 mm. In another embodiment, the plug is providedwith in a substantially cubic shape having a length of 30 mm, a width of6.4 mm and a height of 6.8 mm.

FIG. 2 is a perspective view showing a second side of an electrical plugin accordance with an embodiment of the invention. The second side canbe a bottom side of the plug which is to be electrically coupled to acircuit board or a cable. The plug can comprise a plug substrateconfigured to support the at least one signal pin and the plurality ofpower pins. The plug substrate can be made from an electricallyinsulating and flame resistant material. For instance, the plugsubstrate can be made from an electrically insulating material such as aresin or a mixture of materials. In some embodiments, the plug substrateis made from a mixture of PET and glass fiber, a mixture of PBT andglass fiber, or a mixture of LCP and glass fiber.

The plug substrate can include a base 120. In some embodiments, the plugsubstrate further includes a plurality of side walls 140 which standfrom the base, define an internal space of the plug and surround theplurality of power pins and the at least one signal pin. Alternatively,the plug substrate does not include the plurality of side walls. Theplurality of side walls can include four side walls such that theinternal space thus formed is a substantially cubic space. The internalspace of the plug can receive therein at least a portion of a matingelectrical socket of the plug. A height of the plurality of power pinsand at least one signal pin can be less than a height of the side walls,such that the power pins and at least one signal pin are prevented frombeing erroneously touched by an external object.

A first end of the plurality of power pins and the at least one signalpin can be exposed from a first side of the plug substrate, and a secondend of the plurality of power pins and the at least one signal pin canbe exposed from a second side of the plug substrate. In some instances,the first side of the plug substrate can be opposite to the second sideof the plug substrate. Alternatively, the first side of the plugsubstrate can be adjacent to the second side of the plug substrate. Forexample, the plug substrate has a top side to which a mating socket isassembled, and a bottom side to which a circuit or a cable is attached.The first end of the power pins and the signal pin can be a contactingportion which is configured to electrically connect with a matingelectrical socket. The contacting portion can be exposed from the topside of the plug substrate, such that the contacting portion is at leastpartially received in the internal space of the plug defined by theplurality of side walls of the plug substrate. The second end of thepower pins and the signal pin can be a tip portion 150 which isconfigured to electrically connect to a circuit board or a cable. Thetip portion can be exposed from the bottom side of the plug substrate,such that the second end being electrically coupled to a circuit boardor a cable. In some instances, the tip portion can be a solderingportion to be soldered onto a circuit board such as a printed circuitboard. Alternatively, the tip portion can be an insertion portion whichis to be inserted into a connecting socket or a connecting hold providedon a circuit board or a cable. The tip portion can be shaped intovarious configurations. For instance, the tip portion can have one, twoor more tapered parts. In an embodiment, the tip portion is provided ina shape of folk having to tapered branches.

The tip portion of the power pins and the signal pin can have a reducedwidth than other parts of the power pins and the signal pin. The reducedwidth can facilitate an electrically coupling of the plug to a circuitboard or a cable. For instance, the tip portion having a reduced widthcan facilitate a soldering onto a circuit board or inserted into areceiving socket. In some instances, the tip portion of the plug pinscan stagger in a row. In other words, the tip portion of the plug pinscan be arranged alternatively in a row.

FIG. 3 is a side view of an electrical plug along a first direction inaccordance with an embodiment of the invention. The first direction canbe a longitudinal direction of the plug with respect to a widthdirection. The first end of the power pins and the signal pin, which isthe contacting portion, can be received in the internal space of theplug defined by the plurality of side walls 140. The second end of thepower pins and the signal pin, which is the tip portion, can be exposedfrom the bottom side of the plug substrate. The tip portion of the powerpins and the signal pin can be electrically coupled to a circuit boardor a cable. For instance, the tip portion can be soldered to a circuitboard or a cable or inserted into a receiving socket.

FIG. 4 is a top view of an electrical plug in accordance with anembodiment of the invention. The plug can comprise a plurality of pinsaligned in a row. The plurality of pins can comprise at least one signalpin 131 configured to transmit data and a plurality of power pins 132and 133 configured to transmit electrical power. The plurality of powerpins can include at least one positive power pin and at least onenegative power pin. In some instances, the number of positive power pinscan be equivalent to the number of negative power pins. Alternatively,the number of positive power pins can be different from the number ofnegative power pins. In some embodiments, the plurality of power pinsinclude two positive power pins 133 and two negative power pins 132. Theplurality of pins can be received in an internal space of the plugdefined by a plurality of side walls 140.

In some embodiments, the positive power pins and the at least signal pinare disposed on opposite sides of the negative power pins. In otherwords, the negative power pins can be provided to separate the positivepower pins and the at least one signal pin. The negative power pins canbe grounded such that a voltage thereon is zero. The positive power pinsand the signal pin can carry positive voltage. A spatial separation ofthe positive power pins and the signal pin by the negative power pinscan prevent a false electrical connection between the positive powerpins and the signal pin which may lead to a damage to the electricalsystem. A spatial separation of the positive power pins and the signalpin by the negative power pins can also prevent an electric sparkbetween the positive power pins and the signal pin. In some instances,insulating spacers can be provided between the negative power pins andthe signal pin and between the negative power pins and positive powerpins. The physical separation between the negative power pins and thesignal pin and between the negative power pins and positive power pinscan prevent a false electrical connection between the pins.

The plurality of pins of the plug can comprise a second set of pins inaddition to the first set of pins 131-133. The second set of pins can beprovided in a same row with the first set of pins in the internal spaceof the plug. An insulating spacer can be provided between the first andsecond sets of pins. The second set of pins can have the same electricaland physical characteristics with the first set of pins. A spacingbetween pins in the second set can be identical to a spacing betweenpins in the first set. In some instances, a spacing between the firstset of pins and the second set of pins can be identical to a spacingbetween pins of the first set. Alternatively, a spacing between thefirst set of pins and the second set of pins can be larger than aspacing between pins of the first set.

The second set of pins can include at least one signal pin configured totransmit data and a plurality of power pins configured to transmitelectrical power. In some embodiments, the second set of pins compriseat least one signal pin 136 configured to transmit data and a pluralityof power pins 134 and 135 configured to transmit electrical power. Theplurality of power pins can include two positive power pins 134 and twonegative power pins 135. In the second set of pins, the positive powerpins and the at least signal pin can be disposed on opposite sides ofthe negative power pins. Each of the pins in the second set can beelectrically connected to a corresponding pin in the first group. Forinstance, the signal pin in the second set can be electrically connectedto the signal pin in the first set, the positive power pins in thesecond set can be electrically connected to the positive power pins inthe first set, and the negative power pins in the second set can beelectrically connected to the negative power pins in the first set.

The first and second sets of pins can be arranged symmetrically oppositeto each other on the plug substrate. For instance, as shown in FIG. 4,the pins in the first set can be arranged as a signal pin, negativepower pins and positive pins in a right to left direction, and the pinsin the second set can be arranged as positive pins, negative power pinsand a signal pin in a right to left direction. Since the pins in thesecond set are electrically connected to the corresponding pins in thefirst set, the symmetrical arrangement of pins can allow the plug beinginserted into a mating socket in two opposite orientations, without anyneeds to determining a correct insertion orientation.

The electrical plug can comprise a positioning groove 160. The pluralityof power pins and the at least one signal pin can be provided within thepositioning groove. The positioning groove of the plug can be a part ofthe internal space of the plug defined by sidewalls. For instance, thepositioning groove can be the part of the internal space of the plugthat is not occupied by the pins. The positioning groove of the plug canbe assembled with a positioning boss of a mating socket. For instance,the positioning groove of the plug can receive therein a positioningboss of a mating socket, such that the plug can be accurately assembledinto the mating socket for electrical coupling.

FIG. 5 is a bottom view of an electrical plug in accordance with anembodiment of the invention. The tip portion 150 having a reduced widthof the plug pins, which exposes from the bottom side of the plugsubstrate 120, can stagger in a row. In other words, the tip portion ofthe plug pins may not align in the same row. In case a second set ofpins are provided in addition to a first set of pins as discussedhereinabove, the staggering arrangement of the tip portion in the secondset of pins can be symmetrical with respect to that of the first set ofpins. The staggering arrangement of the tip portion can prevent a falseelectrical connection between the signal pin and the negative power pinsand between the negative power pins and the positive power pins, and canprovide more space for a soldering process when coupling the plug to acircuit board.

The plug can comprise at least one post (not shown in FIG. 5) protrudingfrom the plug substrate on a bottom side of the plug substrate. Thebottom side of the plug substrate can be the side to which the plug iselectrically coupled to an electrical component or a circuit board. Theat least one post can be inserted into a corresponding hole on thecircuit board or soldered onto the circuit board when coupling the plugonto a circuit board, such that an accurate mating between the plug andthe circuit board is ensured.

FIG. 6 is a side view of an electrical plug along a second direction inaccordance with an embodiment of the invention. The second direction canbe a width direction of the plug with respect to a longitudinaldirection. The first end of the power pins and the signal pin, which isthe contacting portion, can be received in the internal space of theplug defined by the plurality of side walls 140. The second end of thepower pins and the signal pin, which is the tip portion 150, can beexposed from the bottom side of the plug substrate. The tip portion ofthe power pins and the signal pin can be electrically coupled to acircuit board or a cable.

FIG. 7 is a perspective view showing a first end of an electrical socket200 in accordance with an embodiment of the invention. The first sidecan be a top side of the socket. The socket can be electrically coupledto a circuit board or a cable at the first side. FIG. 8 is a perspectiveview of a second end of an electrical socket in accordance with anembodiment of the invention. The second end can be opposite to the firstend. The second side can be a bottom side of the socket. The socket canbe electrically coupled to a mating plug at the second side. Theelectrical socket can be provided with various shapes and dimensions inaccordance with applications thereof. The socket can be provided with ina substantially rectangular shape having a length ranging from 10 mm to60 mm, a width ranging from 3 mm to 20 mm and a height ranging from 5 mmto 20 mm. In an embodiment, the socket is provided with in asubstantially cubic shape having a length of 39.4 mm, a width of 12.4 mmand a height of 9.2 mm.

The electrical socket for transmitting power and signal can comprise asocket housing 210 having a plurality of passageways 220. The sockethousing can be made from an electrically insulating material such as aresin or a mixture of materials. The material for socket housing can beflame resistant. In some embodiments, the socket housing is made from amixture of PET and glass fiber, a mixture of PBT and glass fiber, or amixture of LCP and glass fiber.

The socket housing can include a plurality of side walls 230 surroundingthe plurality of passageways. For instance, the socket housing caninclude four side walls to form a substantially cubic socket housing.Each of the plurality of passageways can extend from the first side tothe second side of the socket housing. In some instances, the first sidecan be opposite to the second side. For instance, the plurality ofpassageways can extend from the top side to bottom side of the sockethousing. Alternatively, the first side can be adjacent to the secondside and intersect with the second side. For instance, the plurality ofpassageways can extend from the top side to an adjacent lateral side ofthe socket housing. The plurality of passageways can be providedparallel to each other. The plurality of passageways can be arranged inaccordance with the pins of a mating electrical plug, and configured toengage with corresponding plug pins of the mating electrical plug. Forinstance, the pins of a mating electrical plug can be inserted into theplurality of passageways.

Each of the plurality of passageways can receive therein a contactconfigured to electrically contact a corresponding plug pin of a matingplug. The contacts received in the plurality of passageways can compriseat least one signal contact configured to communicate signal and aplurality of power contacts configured to transmit electrical power. Theplurality of power contacts can comprise at least one power contacthaving a first polarity and at least one power contact having a secondpolarity opposite to the first polarity. For instance, the plurality ofpower contacts can comprise at least one power contact having a positivepolarity and at least one power contact having a negative polarity. Theat least one power contact having a positive polarity can electricallycontact with corresponding positive pin of a mating electrical plug, andthe at least one power contact having a negative polarity canelectrically contact with corresponding negative pin of a matingelectrical plug, when the electrical socket is assembled with the matingelectrical plug.

Each of the plurality of passageways can receive a clamping componenttherein. The clamping component can be configured to firmly clamp a pinof the mating electrical plug. For instance, the clamping component caninclude one or more protrusions which firmly abut again a plug pin. Foranother instance, the clamping component can includes one or more clipswhich firmly grip a plug pin. The clamping components can be made fromconductive material such as metal, such that an electrical connectioncan be established between the pins of the mating plug and the clampingcomponents.

The electrical socket can comprise a boss 240. The boss can be providedin an internal space 270 of the socket defined by the side walls. Theplurality of passageways can be provided in the boss. The part ofinternal space of the socket not occupied by the boss can receive sidewalls of a mating plug. For instance, when a plug shown in FIG. 1 isinserted to the socket, the side walls of the plug substrate can bereceived in the part of the internal space of the socket not occupied bythe boss, and the boss can be received in the positioning groove 160.The boss of the socket can regulate and guide an inserting of a matingplug into the socket. For instance, an inserting of the mating plug intothe socket can be guided by the boss of the socket and the side walls ofthe mating plug.

The electrical socket can comprise a plurality of socket pins 250 on thefirst side. For instance, the plurality of socket pins can be providedon the top side of the socket. The plurality of socket pins can bealigned in a row. A first portion of the plurality of socket pins canprotrude from the plurality of passageways and expose from the top sideof the socket, and a second portion of the plurality of socket pins canbe received in the plurality of passageways. The socket pins can be madefrom conductive material such a metal.

The first portion of the plurality of socket pins, which are exposedfrom the top side of the socket, can be a tip portion which isconfigured to electrically connect to an electrical component, a circuitboard or a cable. For instance, the tip portion of the socket pins canbe soldered to a printed circuit board for electrical connection. Thetip portion can have a reduced width than the other portion of thesocket pins. The second portion of the plurality of socket pins, whichare received in the plurality of passageways, can be configured toelectrically connect with corresponding contacts which are received inthe passageways and configured to electrically contact a correspondingplug pin of a mating plug, when the mating electrical plug is insertedinto the socket. In some instances, the second portion of the pluralityof socket pins, which are received in the plurality of passageways, canbe integral with corresponding contacts which are received in thepassageways. In some instances, the second portion of the plurality ofsocket pins can be electrically coupled to the clamping componentsprovided in the passageways. For instance, the pins of a mating plug canbe firmly held in the passageways of the socket by the clampingcomponents, and electrically coupled to the second portion of theplurality of socket pins within the passageways.

The electrical socket can comprise at least one post 260 which protrudesfrom the first side of the socket housing. For instance, the at leastone post can be provided and protrudes from the top side of the sockethousing. The top side of the socket housing can be the side to which thesocket is electrically coupled to an electrical component or a circuitboard. The at least one post can be provided aligning with the pluralityof socket pins. The at least one post can be used to position and alignthe socket when coupling the socket to an electrical component or acircuit board. For instance, the at least one post can be inserted intoa corresponding hole on a circuit board when coupling the socket ontothe circuit board, such that an accurate mating between the socket andthe circuit board is ensured. For another instance, the at least onepost can be soldered onto a circuit board when coupling the socket ontothe circuit board.

FIG. 9 is a side view of an electrical socket along a first direction inaccordance with an embodiment of the invention. The first direction canbe a longitudinal direction of the socket with respect to a widthdirection. A plurality of socket pins 250 are provided at the top sideof the socket housing 210. In some instances, two posts 260 are providedon the top side of the socket, each of which being positioned at alongitudinal side of the socket housing such that the socket pins arelocated between the two posts. The socket pins and the two posts can bealigned in a row.

FIG. 10 is a top view of an electrical socket in accordance with anembodiment of the invention. FIG. 11 is a bottom view of an electricalsocket in accordance with an embodiment of the invention. A plurality ofsocket pins 250 can be provided on the top side of the socket housing210. A plurality of passageways 220 can be provided in the boss 240 inaccordance with the arrangement of corresponding pins of a mating plug.The internal space of the socket, which is defined by side walls of thesocket housing and not being occupied by the boss, can receive sidewalls of a mating plug when the mating plug is inserted into the socket.The boss of the socket can regulate and guide an inserting of a matingplug into the socket. For instance, an inserting of the mating plug intothe socket can be guided by the boss of socket and the side walls of themating plug.

One or more posts 260 can be provided to protrude from the top side ofthe socket housing. The top side of the socket housing can be the sideto which the socket is electrically coupled to an electrical componentor a circuit board. In some instances, two posts are provided aligningwith the plurality of socket pins, each being disposed at a longitudinalend of the socket housing. The one or more posts can be inserted into acorresponding hole on a circuit board when coupling the socket onto thecircuit board, such that an accurate mating between the socket and thecircuit board is ensured.

FIG. 12 is a side view of an electrical socket along a second directionin accordance with an embodiment of the invention. The second directioncan be a width direction of the socket with respect to a longitudinaldirection. A first portion of the plurality of socket pins 250 canprotrude from the top side of the socket housing 210, and a secondportion of the plurality of socket pins can be received in thecorresponding one of the passageways. The second portion of theplurality of socket pins can be electrically coupled to a correspondingpin of a mating plug when the pins are inserted into the passageways ofthe socket. One or more posts 260 can be provided to protrude from thetop side of the socket housing to ensure an accurate mating between thesocket and an electrical component or a circuit board.

FIG. 13 is a perspective view showing a first side of an electricalconnector in accordance with an embodiment of the invention. Theelectrical connector shown in FIG. 13 can comprise an electrical plug100 shown in FIGS. 1-6 and an electrical socket 200 shown in FIGS. 7-12,in which the electrical plug is inserted into the electrical socket froma bottom side of the electrical socket. The first side of the connectorcan be a top side of the connector, which is the top side of the socketon which the socket pins 250 are provided. FIG. 14 is a perspective viewof a second side of an electrical connector in accordance with anembodiment of the invention. The second side of the connector can be abottom side of the connector, which is the bottom side of the plug onwhich the tip portion 150 of the plug pins of the plug are exposed. FIG.15 is a side view of an electrical connector along a first direction inaccordance with an embodiment of the invention. The first direction canbe a longitudinal direction of the connector with respect to a widthdirection. The socket pins and the tip portion of the plug pins can berespectively electrical coupled to a circuit board or a cable, such thattwo circuit board or two cables can be electrical connected through theelectrical connector.

When the plug is coupled with the socket, the plurality of pins 130 ofthe plug can be inserted into corresponding passageways 220 of thesocket. For instance, at least a portion of the contacting portion ofthe plurality of pins can be inserted into corresponding passageways ofthe socket. In some embodiments, at least a portion of the contactingportion of the plurality of pins can be firmly clamped by the clampingcomponent which is provided in each of the passageways. An electricalpath can be formed between the tip portion of the plurality of powerpins and at least one signal pin of the plug and the socket pins of thesocket when the plug is coupled with the socket, such that the plug andthe socket are electrically connected with each other.

In some embodiments, a portion of the plug can be received in the socketwhen plug is coupled with the socket. For instance, at least a portionof the side walls 140 of the plug can be received in the part ofinternal space. An insertion process of the plug into the socket can beregulated and guided by a mating between the positioning boss of thesocket and the positioning groove of the plug, such that an accurateassembling of the plug with the socket can be ensured. For instance, thepositioning boss of the socket can be clearance fit with the positioninggroove of the plug if the plug is properly assembled into the socket.Upon completion of assembling the plug with the socket, at least aportion of the positioning boss of the socket can be received in thepositioning groove of the plug.

A locking mechanism can be provided to secure a firm assembling betweenthe plug and the socket. The locking mechanism between the plug and thesocket can be releasable, for example, a user can intentionally detachthe plug from the socket if necessary. For instance, at least oneprotrusion can be provided on an outer face of the side walls of theplug, and at least one corresponding recess can be provided on an innerface of the side walls of the socket. When the plug is properly insertedinto the socket, the at least one protrusion can be pushed into thecorresponding recess, such that the plug is prevented from unexpecteddetaching from the socket. For another instance, at least one protrusioncan be provided on an inner face of the side walls of the socket, and atleast one corresponding recess can be provided on an outer face of theside walls of the plug.

FIG. 16 is a top view of an electrical connector in accordance with anembodiment of the invention. A plurality of socket pins 250 can beprovided on the top side of the socket housing 210. The socket pins canbe electrical coupled to a circuit board or a cable. For instance, thesocket pins can be soldered to a battery assembly. One or more posts 260can be provided to protrude from the top side of the socket housing. Insome instances, two posts are provided aligning with the plurality ofsocket pins, each being disposed at a longitudinal end of the socketpins. The one or more posts can be inserted into a corresponding hole ona circuit board or soldered onto the circuit when coupling the socketonto the circuit board, such that an accurate mating between the socketand the circuit board is ensured.

FIG. 17 is a bottom view of an electrical connector in accordance withan embodiment of the invention. The tip portion 150 of the plurality ofpins of the plug can be exposed from the bottom side of the plugsubstrate 120. In some instances, the tip portion of the plug pins canhave a reduced width than the contacting portion of the plug pins andcan stagger in a row. The staggering arrangement of the tip portion canprevent an unwanted electrical connection between the power pins and thesignal pins of the plug, and can provide more space for a solderingprocess when coupling the plug to a circuit board.

FIG. 18 is a side view of an electrical connector along a seconddirection in accordance with an embodiment of the invention. The seconddirection can be a width direction of the connector with respect to alongitudinal direction. The electrical plug 100 can be assembled withthe electrical socket 200, for example, at least a portion of the plugis received in the socket. Electrical components, which are respectivelycoupled to the tip portion 150 of the power pins and the signal pin ofthe plug and the socket pins 250 of the socket, can be electricallycoupled with each with through the connector. For instance, byassembling the plug into the socket, the connecting portion of the powerpins and the signal pin(s) of the plug can be inserted into thepassageways of the socket and electrically coupled with the socket pinsof the socket, such that an electrical connection can be providedbetween the tip portion of the power pins and the signal pin of the plugand the socket pins of the socket.

FIG. 19 is a perspective view showing a first side of an electrical plugin accordance with another embodiment of the invention. The first sidecan be a top side of the plug which is to be electrically coupled to amating electrical socket. The electrical plug can comprise a pluralityof pins 330. The plurality of pins comprise at least one signal pinconfigured to transmit signal and a plurality of power pins configuredto transmit electrical power. The plug can comprise a plug substrate 320configured to support the at least one signal pin and the plurality ofpower pins.

In some embodiments, the at least one signal pin can comprise at leasttwo signal pins. For instance, the at least one signal pin can comprisetwo signal pins, one for transmitting signals and one for receivingsignals. The voltage carried on the signal pin can be a positivevoltage. In some embodiments, the plurality of power pins can compriseat least one power pin having a first polarity and at least one powerpin having a second polarity which is opposite to the first polarity.The first polarity can be a positive polarity, and the second polaritycan be a negative polarity. In some embodiments, the plurality of powerpins comprise two or more pins having a positive polarity (e.g.,“positive power pins”) and two or more pins having a negative polarity(e.g., “negative power pins”). In some embodiments, the plug comprisesat least one post 370 protruding from the plug substrate on the top sideof the plug. The at least one post can be provided aligning with theplurality of power pins and at least one signal pin. In some instances,two posts are respectively provided at two longitudinal ends of the plugsubstrate. The at least one post can function as a positioning andguiding component when the plug is assembled with the socket. Forinstance, the at least one post can be aligned with a corresponding holeof a mating electrical socket and then inserted into a correspondinghole of a mating electrical socket when the plug is assembled with thesocket, such that a correct aligning and assembling are ensured.

In some embodiments, the plug substrate has no side walls which standfrom the plug substrate and surround the plurality of power pins and theat least one signal pin. In other words, the plurality of power pins andthe at least one signal pin can be exposed from the plug substrate onthe top side of the plug.

FIG. 20 is a perspective view of a second side of an electrical plug inaccordance with another embodiment of the invention. The second side canbe a bottom side of the plug which is to be electrically coupled to acircuit board or a cable. A first end of the plurality of power pins andthe at least one signal pin can be exposed from a first side of the plugsubstrate, and a second end of the plurality of power pins and the atleast one signal pin can be exposed from a second side of the plugsubstrate. In some instances, the first side of the plug substrate canbe opposite to the second side of the plug substrate. For instance, thefirst side of the plug substrate can be the top side of the plugsubstrate, and the second side of the plug substrate can be the bottomside of the plug substrate. Alternatively, the first side of the plugsubstrate can be adjacent to the second side of the plug substrate. Forinstance, the first side and second side of the plug substrate canintersect with each other.

The first end of the power pins and the signal pin can be a contactingportion 330 which is configured to electrically connect with a matingelectrical socket. The contacting portion can be exposed from the topside of the plug substrate. The second end of the power pins and thesignal pin can be a tip portion 350 which is configured to electricallyconnect to a circuit board or a cable. The tip portion can be exposedfrom the bottom side of the plug substrate, such that the second endbeing electrically coupled to a circuit board or a cable. In someinstances, the tip portion can be a soldering portion to be solderedonto a circuit board such as a printed circuit board. Alternatively, thetip portion can be an insertion portion which is to be inserted into aconnecting socket or a connecting hold provided on a circuit board or acable. The tip portion can be shaped into various configurations. In anembodiment, each of the tip portion is provided in a shape of folkhaving to tapered branches. The tip portion can be aligned in a samerow.

At least one post 380 can be provided on the bottom side of the plugsubstrate. The at least one post can be used to position and align theplug when coupling the plug to an electrical component or a circuitboard. For instance, the at least one post can be inserted into acorresponding hole on a circuit board when coupling the plug onto thecircuit board, such that an accurate mating between the plug and thecircuit board is ensured. For another instance, the at least one postcan be soldered onto a circuit board when coupling the plug onto thecircuit board. In some embodiments, two posts are provided on the bottomside of the plug substrate, each of which is positioned at alongitudinal end of the plug substrate. The at least one post can bealigned in a row with the tip portion of the plurality of pins of theplug.

FIG. 21 is a side view of an electrical plug along a first direction inaccordance with another embodiment of the invention. The first directioncan be a longitudinal direction of the plug with respect to a widthdirection. The contacting portion 330 and the tip portion 350 of theplurality of pins of the plug can be provided at opposite sides of theplug substrate. Among the plurality of pins of the plug, the negativepower pins can have a longer length than the positive power pins and theat least one signal pin in the contacting portion. For instance, thenegative power pins 332 can extend longer than the positive power pins333 and the at least one signal pin 331 from the top side of the plugsubstrate. When the plug is inserted into a mating socket, the longernegative pins can be connected to electrically corresponding socket pinswhich are electrically grounded, before the positive power pins and theat least one signal pin are electrically connected to correspondingsocket pins. This plug pin configuration can prevent an electric sparkwhen the positive power pins and the at least one signal pin, both ofwhich carry a positive signal, are electrically connected tocorresponding socket pins, because the plug is electrically groundedbefore the positive power pins and the at least one signal pin areconnected to the socket. The negative power pins can have a longerlength ranging from 0.1 mm to 10 mm than the positive power pins and theat least one signal pin from the top side of the plug substrate. In anembodiment, the negative power pins has a longer length ranging from 0.6mm than the positive power pins and the at least one signal pin from thetop side of the plug substrate. In another embodiment, the negativepower pins has a longer length ranging from 0.8 mm than the positivepower pins and the at least one signal pin from the top side of the plugsubstrate.

The positive power pins and the at least signal pin are disposed onopposite sides of the negative power pins. A spatial separation of thepositive power pins and the signal pin by the negative power pins canprevent a false electrical connection and an electric spark between thepositive power pins and the signal pin which may lead to a damage to theelectrical system. The plurality of pins of the plug can comprise asecond set of pins 334-336 in addition to the first set of pins 331-333.The first and second sets of pins can be arranged symmetrically oppositeto each other on the plug substrate. For instance, pins 334 can bepositive power pins which are electrically connected to the positivepower pins 333, pins 335 can be negative power pins which areelectrically connected to the negative power pins 332, and pin 336 canbe a signal pin which is electrically connected to the signal pins 331.The symmetrical arrangement of pins can allow the plug being insertedinto a mating socket in two opposite orientations, without any needs todetermining a correct insertion orientation.

FIG. 22 is a top view of an electrical plug in accordance with anotherembodiment of the invention. The pins 331-336 of the plug can be groupedinto a first set of pins 331-333 and a second set of pins 334-336. Thefirst and second sets of pins can be arranged symmetrically opposite toeach other on the plug substrate. At least one post 370 can be on thetop side of the plug substrate, functioning as a positioning and guidingcomponent when the plug is assembled with the socket.

FIG. 23 is a bottom view of an electrical plug in accordance withanother embodiment of the invention. The tip portion 350 having one ormore tapered portions of the plurality of pins of the plug, which areexposed from the bottom side of the plug substrate 320, can be alignedin a row. FIG. 24 is a side view of an electrical plug along a seconddirection in accordance with another embodiment of the invention. Thesecond direction can be a width direction of the plug with respect to alongitudinal direction. The contacting portion 330 and the tip portion350 of the plurality of pins of the plug can be provided on oppositesides of the plug substrate. Alternatively, the contacting portion andthe tip portion of the plurality of pins of the plug can be provided onadjacent sides of the plug substrate.

FIG. 25 is a perspective view showing a first side of an electricalsocket 400 in accordance with another embodiment of the invention. Thefirst side can be a top side of the socket. The socket can beelectrically coupled to a circuit board or a cable at the first side.FIG. 26 is a perspective view of a second side of an electrical socketin accordance with another embodiment of the invention. The second sidecan be a bottom side of the socket. The socket can be electricallycoupled to a mating plug at the second side.

The electrical socket for transmitting power and signal can comprise asocket housing 410. A plurality of passageways 420 can be provided onthe socket housing, and extend from a first side to a second side of thesocket housing. In some embodiments, the first side can be adjacent tothe second side. For instance, the plurality of passageways can extendfrom the bottom side to an adjacent side of the socket housing. When amating electrical plug is assembled with the socket, corresponding pinsof the plug can be inserted into the passageways of the socket from atleast two directions. For instance, the plurality of pins of the matingplug can be inserted into corresponding passageways of the socket fromboth a bottom side and an adjacent lateral side of the socket. Thecorresponding pins of the mating plug can also be inserted into thepassageways of the socket from an arbitrary direction ranging from adirection of the bottom side to a direction of the adjacent lateral sideof the socket. In some instances, the second portion of the plurality ofsocket pins can be electrically coupled to the clamping componentsprovided in the passageways, which can firmly clamp the pins of a matingplug when the mating plug is assembled with the socket.

The electrical socket can comprise a plurality of socket pins 450 on thetop side of the socket housing. The plurality of socket pins can bealigned in a row. A first portion of the plurality of socket pins canprotrude from the top side of the socket, and a second portion of theplurality of socket pins can be received in the plurality ofpassageways. The first portion of the plurality of socket pins, whichare exposed from the top side of the socket, can be a tip portion whichis configured to electrically connect to an electrical component, acircuit board or a cable. The tip portion of the socket pins can bealigned in a line and can be shaped into various configurations. In anembodiment, the tip portion is provided in a shape of folk having totapered branches. The second portion of the plurality of socket pins,which are received in the plurality of passageways, can be configured toelectrically connect with corresponding pins of a mating electrical plugwhen the mating electrical plug is inserted into the socket.

The electrical socket can comprise at least one post 460 which protrudesfrom the top side of the socket housing. The at least one post can beprovided at a longitudinal end of the socket housing. The at least onepost can be used to position and align the socket when coupling thesocket to an electrical component or a circuit board. For instance, theat least one post can be inserted into a corresponding hole on a circuitboard when coupling the socket onto the circuit board, such that anaccurate mating between the socket and the circuit board is ensured. Foranother instance, the at least one post can be soldered onto a circuitboard when coupling the socket onto the circuit board.

FIG. 27 is a side view of an electrical socket along a first directionin accordance with another embodiment of the invention. The firstdirection can be a longitudinal direction of the socket with respect toa width direction. A plurality of socket pins 450 are provided at thetop side of the socket housing 410. In some instances, two posts 460 areprovided on the top side of the socket housing, each of which beingpositioned at a longitudinal end of the socket housing. The socket pinsand the two posts can be aligned in a row. The two posts can be used toposition and align the socket when coupling the socket to an electricalcomponent or a circuit board.

FIG. 28 is a top view of an electrical socket in accordance with anotherembodiment of the invention. FIG. 29 is a bottom view of an electricalsocket in accordance with another embodiment of the invention. Aplurality of socket pins 450 can be provided on the top side of thesocket housing 410. A plurality of passageways 420 can be provided onthe socket housing in accordance with the arrangement of correspondingpins of a mating plug, and extend from the bottom side to an adjacentside of the socket housing. One or more posts 460 can be provided toprotrude from the top side of the socket housing. In some instances, twoposts are provided aligning with the plurality of socket pins, eachbeing disposed at a longitudinal end of the socket housing.

FIG. 30 is a side view of an electrical socket along a second directionin accordance with another embodiment of the invention. The seconddirection can be a width direction of the socket with respect to alongitudinal direction. A first portion of the plurality of socket pins450 can protrude from the top side of the socket housing 410, and asecond portion of the plurality of socket pins can be received in thecorresponding one of the passageways. The second portion of theplurality of socket pins can be electrically coupled to a correspondingpin of a mating plug when the pins of the plug are inserted into thepassageways of the socket from at least two directions. One or moreposts 460 can be provided to protrude from the top side of the sockethousing to ensure an accurate mating between the socket and anelectrical component or a circuit board.

FIG. 31 is a perspective view showing a first side of an electricalconnector in accordance with another embodiment of the invention. Theelectrical connector shown in FIG. 31 can comprise an electrical plug300 shown in FIGS. 19-24 and an electrical socket 400 shown in FIGS.25-30, in which the electrical plug is inserted into the electricalsocket from a bottom side of the electrical socket in an X direction.Alternatively, the electrical plug can be inserted into the electricalsocket from a side of the electrical socket in a Y direction since thepassageways 420 of the socket extend from the bottom side to an adjacentside of the socket housing. The first side of the connector can be a topside of the connector, which is the top side of the socket on which thesocket pins 450 are provided. FIG. 32 is a perspective view of a secondside of an electrical connector in accordance with another embodiment ofthe invention. The second side of the connector can be a bottom side ofthe connector, which is the bottom side of the plug on which the tipportion 350 of the plug pins of the plug are exposed. When the plug iscoupled with the socket, the plurality of pins of the plug can beinserted into corresponding passageways of the socket from at least twodirections. In some instances, at least a portion of the contactingportion of the plurality of pins can be firmly clamped by clampingcomponents which are provided in each of the passageways. An electricalpath can be formed between the tip portion of the plurality of pins ofthe plug and the socket pins of the socket when the plug is coupled withthe socket, such that the plug and the socket are electrically connectedwith each other.

FIG. 33 is a side view of an electrical connector along a firstdirection in accordance with another embodiment of the invention. Thefirst direction can be a longitudinal direction of the connector withrespect to a width direction. The socket pins 450 and the tip portion350 of the plug pins can be respectively exposed on the first side andsecond side of the connector, and can be electrically coupled to anelectrical component, a circuit board or a cable. In some embodiments,the first side and second side of the connector can be opposite to eachsuch. For instance, the first side can be a top side, and the secondside can be a bottom side. Alternatively, the first side and second sideof the connector can be adjacent. For instance, the first side can be atop side, and the second side can be a lateral side which intersectswith the top side.

In some embodiments, two posts 380 are provided on the bottom side ofthe plug substrate, each of which is positioned at a longitudinal end ofthe plug substrate. The two posts can be aligned in a row with the tipportion of the plurality of pins of the plug 300. The two posts can beused to position and align the plug when coupling the plug to anelectrical component or a circuit board. In some embodiments, two posts460 are provided on the top side of the socket housing. The two postscan be provided at a longitudinal end of the socket housing. The twoposts can be used to position and align the socket when coupling thesocket to an electrical component or a circuit board.

FIG. 34 is a top view of an electrical connector in accordance withanother embodiment of the invention. A plurality of socket pins 550 canbe provided on the top side of the socket housing 510. The socket pinscan be electrical coupled to a circuit board or a cable. FIG. 35 is abottom view of an electrical connector in accordance with anotherembodiment of the invention. The tip portion 350 of the plurality ofpins of the plug, which are exposed from the bottom side of the plugsubstrate 320, can be aligned in a row. FIG. 36 is a side view of anelectrical connector along a second direction in accordance with anotherembodiment of the invention. The second direction can be a widthdirection of the connector with respect to a longitudinal direction. Theelectrical plug 300 can be assembled with the electrical socket 400 fromat least two directions. For instance, the plurality of pins of the plugcan be inserted into the corresponding passageways of the socket fromboth a bottom side and an adjacent lateral side of the socket since thepassageways extend from the bottom side to adjacent lateral side of thesocket housing.

FIG. 37 is a side view of an electrical socket and an electrical plugalong a first direction in accordance with another embodiment of theinvention. The first direction can be a longitudinal direction of thesocket and the plug with respect to a width direction. The plurality ofpower pins and at least one signal pin of the electrical plug can extendfrom the plug substrate 320 with the same length. The contacts receivedin the plurality of passageways of the socket housing 410 can beprovided with different length. In some embodiments, the power contacts470 having a negative polarity are provided with a longer length thanthe power contacts having a positive polarity and the signal contact.When the pins of the plug is inserted into the passageways of thesocket, corresponding negative pins 332 of the plug can be electricallyconnected to the longer power contacts 470 having a negative polarity ofthe socket, which are electrically grounded, before the positive powerpins and the at least one signal pin are electrically connected tocorresponding contact received in the passageways. This socket contactconfiguration can prevent an electric spark because the plug iselectrically grounded before the positive power pins and the at leastone signal pin are electrically connected to corresponding powercontacts and signal contact of the socket.

FIG. 38 is a flow chart illustrating a method of manufacturing anelectrical plug, in accordance with an embodiment of the invention. Inprocess 3802, a plug substrate can be provided. The plug substrate canbe made from an electrically insulating and flame resistant material.The plug substrate can include a base. In some instances, the plugsubstrate further includes a plurality of side walls which stand from atop side of the base to define an internal space of the plug. The plugsubstrate can be provided with a plurality of holes in predeterminedpositions and predetermined pattern, such that a plurality of pin can beinserted into the holes.

In process 3804, a plurality of pins, including a plurality of powerpins configured to transmit electrical power and at least one signal pinconfigured to communicate signal, can be disposed on the plug substrate.The plurality of pins can be inserted into holes on the plug substrate.The plurality of power pins can comprise at least one power pin having apositive polarity and at least one power pin having a negative polarity.In some embodiments, two or more pins having a positive polarity and twoor more pins having a negative polarity can be provided on the plugsubstrate. In some embodiments, two or more signal pins can be providedon the plug substrate.

FIG. 39 is a flow chart illustrating a method of manufacturing anelectrical plug, in accordance with another embodiment of the invention.In process 3902, a plurality of pins, including a plurality of powerpins configured to transmit electrical power and at least one signal pinconfigured to communicate signal, can be provided. The plurality ofpower pins can comprise at least one power pin having a positivepolarity and at least one power pin having a negative polarity. In someembodiments, two or more pins having a positive polarity and two or morepins having a negative polarity can be provided. In some embodiments,two or more signal pins can be provided. The plurality of power pins canbe provided and positioned in predetermined positions and predeterminedpattern.

In process 3904, the plurality of power pins and at least one signal pincan be molded with a plug substrate. The plug substrate can be made froman electrically insulating and flame resistant material. The pluralityof can be molded such that a first end of the plurality of the pins canbe exposed from a first side of the plug substrate, and a second end ofthe pins can be exposed from a second side of the plug substrate. Theelectrical plug can be manufactured by various processes, not limited tothe processes as discussed hereinabove.

FIG. 40 is a flow chart illustrating a method of manufacturing anelectrical socket, in accordance with an embodiment of the invention. Inprocess 4002, a socket housing can be provided. The socket housing canbe made from an electrically insulating and flame resistant material. Aplurality of passageways can be formed in the socket housing. Theplurality of passageways can engage with corresponding plug pins of amating electrical plug. Each of the plurality of passageways can extendfrom a first side to a second side of the socket housing. In someinstances, the first side can be opposite to the second side. Forinstance, the plurality of passageways can extend from the top side tobottom side of the socket housing. Alternatively, the first side can beadjacent to the second side. For instance, the plurality of passagewayscan extend from the top side to an adjacent lateral side of the sockethousing.

In process 4004, a plurality of contacts can be disposed in thepassageways. Each of the plurality of contacts can be configured toelectrically contact a corresponding plug pin of a mating electricalplug in the passageways. The plurality of contacts can be made from ametal material having good conductivity. The plurality of contacts caninclude at least one signal contact configured to communicate signal anda plurality of power contacts configured to transmit electrical power.The plurality of power contacts can include at least one power contacthaving a first polarity and at least one power contact having a secondpolarity opposite to the first polarity. In some instances, the firstpolarity is a positive polarity, and the second polarity is a negativepolarity.

In some embodiments, a plurality of socket pins can be provided on a topside of the socket. A first portion of the socket pins can be exposedfrom the top side of the socket and configured to electrically connectto an electrical component, a circuit board or a cable. A second portionof the socket pins can be received in the plurality of passageways andconfigured to electrically connect with corresponding pins of a matingelectrical plug when the mating electrical plug is inserted into thesocket. In some instances, the contacts can be the second portion of thesocket pins received in the plurality of passageways. Alternatively, thecontacts can be a portion of the second portion of the socket pins.Alternatively, the contacts can be electrically connected to the secondportion of the socket pins. The electrical socket can be manufactured byvarious processes, not limited to the processes as discussedhereinabove.

FIG. 41 is a flow chart illustrating a method of manufacturing anelectrical socket, in accordance with an embodiment of the invention. Inprocess 5002, a plurality of contacts are disposed in a mold. Theplurality of contacts can be configured to electrically contact acorresponding plug pin of a mating electrical plug. The plurality ofcontacts can be made from a metal material having good conductivity. Theplurality of contacts can include at least one signal contact configuredto communicate signal and a plurality of power contacts configured totransmit electrical power. The plurality of power contacts can includeat least one power contact having a first polarity and at least onepower contact having a second polarity opposite to the first polarity.In some instances, the first polarity is a positive polarity, and thesecond polarity is a negative polarity.

In process 5004, the plurality of contacts is molded with a sockethousing, and a plurality of passageways can be formed in the sockethousing. Each of the plurality of passageways extends from a first sideto a second side of the socket housing and receives therein at least onecontact of the plurality of contacts. In some instances, the first sidecan be opposite to the second side. For instance, the plurality ofpassageways can extend from the top side to bottom side of the sockethousing. Alternatively, the first side can be adjacent to the secondside. For instance, the plurality of passageways can extend from the topside to an adjacent lateral side of the socket housing. The sockethousing can be made from an electrically insulating and flame resistantmaterial. The plurality of passageways can engage with correspondingplug pins of a mating electrical plug.

FIG. 42 is a view showing pin arrangement of an electrical plug inaccordance with an embodiment of the invention. The electrical plug cancomprise a plurality of pins. For instance, the electrical plug as shownin FIG. 42 comprises 12 pins. The plurality of pins can comprise atleast one signal pin configured to transmit signal and a plurality ofpower pins and configured to transmit electrical power. For instance,the plurality of pins as shown in FIG. 42 comprise signal pins 1, 2 and12, and power pins 3-11. The signal pins 1 and 12 transmit and receivesignals to and from a bus, such as a Universal AsynchronousReceiver/Transmitter (UART). The signal pin 2 transmits and receives asignal indicative of a battery status, such as whether a battery isconnected. The power pins 3, 4 and power pins 9, 10 are power pinshaving a negative polarity. The power pins 5, 6, 7 and 8 are power pinshaving a positive polarity. The power pins 5, 6, 7 and 8 having apositive polarity and signal pins 1 and 2 are positioned on oppositesides of the power pins 3 and 4 having a negative pins. The power pin 11is a power pin for outputting power to an external device. Another setof pins can be provided which are disposed symmetrically opposite to thepins 1-12, such that the plug can be connected to a corresponding socketin both a forward direction and a reverse direction.

While preferred embodiments of the present invention have been shown anddescribed herein, it will be obvious to those skilled in the art thatsuch embodiments are provided by way of example only. Numerousvariations, changes, and substitutions will now occur to those skilledin the art without departing from the invention. It should be understoodthat various alternatives to the embodiments of the invention describedherein may be employed in practicing the invention. It is intended thatthe following claims define the scope of the invention and that methodsand structures within the scope of these claims and their equivalents becovered thereby.

1-37. (canceled)
 38. An unmanned aerial vehicle, comprising: a body; aplurality of propulsion units carried by the body and configured toeffect movement of the unmanned aerial vehicle; an electrical plug forpower and signal transmission and provided on the body, the electricalplug, comprising: a plurality of pins comprising at least one signal pinconfigured to communicate signal, and a plurality of power pinsconfigured to transmit electrical power, the plurality of power pinscomprising at least one power pin having a positive polarity and atlease one power pin having a negative polatiry; and a plug substrateconfigured to support the plurality of pins; and a battery assemblyelectrically connected to the body via the electrical plug, the batteryassembly comprising: at least one battery; and an electrical socketcomprising a socket housing having a plurality of passageways, whereinthe plurality of passageways are arranged corresponding to anarrangement of the at least one signal pin and the plurality of powerpins of the electrical plug, each of the plurality of passagewaysreceiving therein a contact configured to electrically contact acorresponding signal pin and power pins of the electrical plug, thecontacts of the plurality of passageways comprising at least one signalcontact configured to transmit electrical power, the plurality of powercontacts comprising at least one power contact having a positivepolarity and the least one power contact having a negative polarity;wherein the at least one power pin having a negative polarity has alonger length that the at least one power pin having a positive polarityand the at least one signal pin. 39-78. (canceled)
 79. An unmannedaerial vehicle, comprising: a body; a plurality of propulsion unitscarried by the body and configured to effect a moving of the unmannedaerial vehicle; a battery assembly; and an electrical connector forpower and signal transmission, the electrical connector comprising: anelectrical plug comprising: at least one signal pin configured tocommunicate signal; a plurality of power pins configured to transmitelectrical power, wherein the plurality of power pins comprise at leastone power pin having a positive polarity and at least one power pinhaving a negative polarity; and a plug substrate configured to supportthe at least one signal pin and the plurality of power pins, wherein theat least one power pin having a negative polarity has a longer lengththan the at least one power pin having a positive polarity and the atleast one signal pin; and an electrical socket comprising a sockethousing having a plurality of passageways, wherein the plurality ofpassageways are arranged corresponding to an arrangement of the at leastone signal pin and the plurality of power pins of the electrical plug,each of the plurality of passageways receiving therein a contactconfigured to electrically contact a corresponding signal pin and powerpins of the electrical plug, the contacts of the plurality ofpassageways comprising at least one signal contact configured tocommunicate signal and a plurality of power contacts configured totransmit electrical power, the plurality of power contacts comprising atleast one power contact having a positive polarity and at least onepower contact having a negative polarity; wherein the battery assemblyis adapted to provide power to said one or more propulsion units via theelectrical connector.
 80. (canceled)
 81. The unmanned aerial vehicle ofclaim 38, wherein the at least one power pin having a positive polaritycomprising a power pin which is configured to output a constant voltage.82. The unmanned aerial vehicle of claim 38, wherein the at least onesignal pin comprising at least one signal pin for transmitting signaland at least one signal pin for receiving signal.
 83. The unmannedaerial vehicle of claim 38, wherein the at least one signal pincomprising only one signal pin for transmitting and receiving signal.84. The unmanned aerial vehicle of claim 38, wherein the at least onesignal pin comprising a signal pin which is configured to detect aconnecting status of the electrical plug to the electrical socket. 85.The unmanned aerial vehicle of claim 38, wherein the plug substrateincludes a base.
 86. The unmanned aerial vehicle of claim 85, whereinthe plug substrate further includes a plurality of side walls definingthe internal space and surrounding the power pins and the at least onesignal pin.
 87. The unmanned aerial vehicle of claim 86, wherein aheight of the plurality of power pins and at least one signal pin isless than a height of the side walls.
 88. The unmanned aerial vehicle ofclaim 86, wherein the internal space of the plug is configured toreceive therein at least a portion of a mating electrical socket. 89.The unmanned aerial vehicle of claim 38, wherein a first end of thepower pins and the at least one signal pin is exposed at a first side ofthe plug substrate, and a second end of the power pins and the at leastone signal pin is exposed at a second side of the plug substrate. 90.The unmanned aerial vehicle of claim 89, wherein the first side beingopposite to the second side.
 91. The unmanned aerial vehicle of claim38, wherein a first end of the power pins and the signal pin is acontacting portion, the contacting portion being configured toelectrically connect with a mating electrical socket.
 92. The unmannedaerial vehicle of claim 91, wherein the first end of the power pins andthe at least one signal pin is received in an internal space of the plugsubstrate, the internal space being defined by a plurality of side wallsof the plug substrate.
 93. The unmanned aerial vehicle of claim 38,wherein a second end of the power pins and the at least one signal pinis a tip portion, the tip portion being configured to electricallyconnect to a circuit board or a cable.
 94. The unmanned aerial vehicleof claim 93, wherein the tip portion is a soldering portion.
 95. Theunmanned aerial vehicle of claim 93, wherein the tip portion has atleast two protrusions which are parallel to each other.
 96. The unmannedaerial vehicle of claim 93, wherein the circuit board is a printedcircuit board.
 97. The unmanned aerial vehicle of claim 93, wherein thetip portion has a reduced width than other parts of the power pins andthe at least one signal pin.
 98. The unmanned aerial vehicle of claim97, wherein the tip portion staggers in a row.
 99. The unmanned aerialvehicle of claim 38, wherein the at least one power pin having apositive polarity and the at least one signal pin have the same length.100. The unmanned aerial vehicle of claim 38, wherein the at least onepower pin having a negative polarity has a same length as the at leastone power pin having a positive polarity and the at least one signal pin101. The unmanned aerial vehicle of claim 38, wherein the at least onepower pin having a positive polarity and the at least signal pin aredisposed on opposite sides of the at least one power pin having anegative polarity.
 102. The unmanned aerial vehicle of claim 38, whereinthe plurality of power pins and the at least one signal pin comprise afirst set of power pins and signal pins and a second set of power pinsand signal pins, and wherein the first and second sets of power pins andsignal pins are disposed symmetrically opposite to each other on theplug substrate.
 103. The unmanned aerial vehicle of claim 102, whereinthe second set of power pin and the at least one signal pin are providedin a row with the first set of power pins and the at least one signalpin.
 104. The unmanned aerial vehicle of claim 38, wherein theelectrical plug further comprising a positioning groove.
 105. Theunmanned aerial vehicle of claim 104, wherein the power pins and the atleast one signal pin are provided within the positioning groove. 106.The unmanned aerial vehicle of claim 104, wherein the positioning grooveof the plug is configured to clearance fit with a positioning boss of amating electrical socket.
 107. The unmanned aerial vehicle of claim 38,wherein the electrical plug further comprising at least one postprotruding from the plug substrate on the same side of the plugsubstrate on which the power pins and the at least one signal pin aresupported, the at least one post being configured to engage with acorresponding positioning hole of a mating electrical socket.
 108. Theunmanned aerial vehicle of claim 107, wherein the at least one postaligns with the power pins and the at least one signal pin.